Chemistry · Science General

Separation Techniques

842 Questions

Separation techniques involve physical methods to isolate mixtures, including distillation, filtration, and crystallization. Competitive exams frequently test these foundational concepts. Review the exact processes to enhance problem solving speed.

Distillation and evaporationCrystallization processFiltration methodsSeparating dissolved solidsChromatography and mass techniques

Separation Techniques Questions

Multiple choice

The method that is used to obtain pure salt from impure salt

  1. Decantation

  2. Crystallization

  3. Evaporation

  4. Condensation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Explanation: Crystallization is also a chemical solid–liquid separation technique, in which mass transfer of a solute from the liquid solution to a pure solid crystalline phase occurs. In chemical engineering crystallization occurs in a crystallizer.

Multiple choice

The method used to separate a dissolved solid component from its solution

  1. Evaporation

  2. Filtration

  3. sedimentation

  4. Decantation
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Explanation: Evaporation is a type of vaporization of a liquid that occurs from the surface of a liquid into a gaseous phase that is not saturated with the evaporating substance. The other type of vaporization is boiling, which is characterized by bubbles of saturated vapor forming in the liquid phase.

Multiple choice

A pure solid is obtained from its solution by the process of

  1. Condensation

  2. decantation

  3. Sedimentation

  4. Filtration
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Explanation: Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.